1969 Dart Street/Strip (Re)Build

clinteg said

This is the second rear main seal that's been put in it so I'd hate to think that would be the culprit but like you've found, it can happen. It could also be leaking down from the valve covers. I seem to notice oil around the rear corners now and then. Either way I'm sure I'll get it all figured out.

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Valve covers were an issue also, went ahead and spent the money for the rubber with the metal insert. No more leaks there. Dan Dvorak is the only guy who had the good rear seals. I think they were called red seals or something along that line. He guaranteed now more leaks. We will see. I'm waiting on him to finish my motor.
Good luck bro